ODM2 ActionType Controlled Vocabulary ODM2 Working Group A vocabulary for describing the type of actions performed in making observations. Depending on the action type, the action may or may not produce an observation result. Instrument calibration The act of calibrating an instrument either in the field or in a laboratory. The instrument may be an in situ field sensor or a laboratory instrument. An instrument is the subclass of equipment that is capable of making an observation to produce a result. Equipment